| Title |
Influence of the Combustion Flames on the Flashover Characteristics of the Sphere-Sphere Air Gap |
| Authors |
In-Sik Kim ; Sang-Woo Lee |
| Keywords |
Flashover voltage ; Combustion flame ; Sphere electrode ; thermal ionization |
| Abstract |
In this paper, reduction characteristics of the AC and DC flashover voltage in the horizontal air gap of sphere-sphere electrode system were investigated when the combustion flame was present near the high voltage electrode. The voltage and current waveforms were measured, when the flashover is occurred, in order to examine the flashover polarity by flame. The reduction characteristics of AC flashover voltage were discussed with the thermal ionization process, the relative air density and the deflection phenomena in the shape of flames that caused by the coulomb"s force. As the results of an experimental investigation, It was found that the reduction of flashover voltages in sphere-sphere system, in comparison with the no flame case, are 79.9[%] for k=0, 82.9[%] for k=0.5, 87.5[%] for k=1.0, 85.0[%] for h=0[cm], 40.8[%] for h=5[cm] and 28.2[%] for h=9[cm] when ac voltage is applied. The influence for thermal ionization process of the combustion flame in small scale no particular change is recognized. |